Email Formats

{
  "mx": [
    "0 mail.btracking.com."
  ],
  "spf": [
    "v=spf1 +a +mx +ip4:199.127.240.0/21 +ip4:200.225.43.166 include:mail.zendesk.com include:_spf.wlius.com ~all"
  ]
}